Общий каталог Tungaloy 2020 - 2021 - страница 1625

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Turning Tools B

Troubleshooting i n turning

Typical tool failureToolgradeCountermeasure Cutting conditionsIn
Flank wear• Change to more wear resistant grades P, M, K30/20/10• Reduce cutting speed • Change to appropriate feed • Change to wet cutting• Decrease honing width • Increase relief angle • Increase end cutting edge angle • Increase corner radius • Select free-cutting chipbreaker • Increase rake angleExt. Toolholder
Crater wear• Change to more wear resistant grades P, M, K30/20/10• Reduce cutting speed • Reduce feed • Reduce depth of cut • Change to wet cutting• Increase rake angle • Select an appropriate chipbreaker • Increase side cutting edge angle • Increase corner radiusInt. Toolholder
Notch wear• Change to more wear resistant grades P, M, K30/20/10• Reduce cutting speed • Reduce feed• Increase rake angle • Increase side cutting edge angleThreading g
Fracture• Change to tougher grades • Change to thermal-shock resistant grades P, M, K10/20/30• Reduce feed • Reduce depth of cut • Improve holding rigidity of work and tool • Reduce overhang length of toolholder • Improve looseness in machine• Reduce rake angle • Select a chipbreaker with high edge strength • Increase honing width • Increase side cutting edge angle • Select larger shank size • Increase corner radiusGroovin tool
Chipping• Change to tougher grades P, M, K10/20/30• Reduce cutting speed • Reduce feed • Reduce depth of cut • Improve holding rigidity of work and tool • Reduce overhang length of toolholder • Improve looseness in machine• Reduce rake angle • Select a chipbreaker with high edge strength • Increase honing width • Increase side cutting edge angle • Select larger shank sizeMiniature cutter
Flaking• Change to tougher grades P, M, K10/20/30• Reduce cutting speed • Reduce feed• Reduce rake angle • Increase corner radius • Increase honing widthMilling dmill
Plastic deformation• Change to more wear resistant grade P, M, K30/20/10• Reduce cutting speed • Change to appropriate feed • Reduce depth of cut • Supply cutting fl uid in adequate volumel • Increase relief angle • Increase rake angle • Reduce corner radius • Reduce side cutting edge angle • Select a free-cutting chipbreakerEn ing tool
Chip welding Built-up edge• Use a grade which has a low tendency to adhere to workpiece material Cemented carbide/ Coated carbide or cermet• Increase cutting speed • Increase feed • Change to water-insoluble cutting fl uid • Change to wet cutting• Increase rake angle • Select a free-cutting chipbreaker • Decrease honing widthDrill Tooling System ser's Guide
Thermal cracking• Change to tougher grades • Change to thermal-shock resistant grades P, M, K10/20/30• Reduce cutting speed • Reduce feed • Change to dry cutting • Supply cutting fl uid in adequate volume • Reduce depth of cut • Change to water-insoluble cutting fl uid• Increase rake angle • Select a free-cutting chipbreaker • Decrease honing widthU Index

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